mbed library sources. Supersedes mbed-src.
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targets/TARGET_NORDIC/TARGET_NRF5/nordic_critical.c
- Committer:
- fwndz
- Date:
- 2016-12-22
- Revision:
- 153:9398a535854b
- Parent:
- 149:156823d33999
File content as of revision 153:9398a535854b:
/* * Copyright (c) 2015-2016, ARM Limited, All Rights Reserved * SPDX-License-Identifier: Apache-2.0 * * Licensed under the Apache License, Version 2.0 (the "License"); you may * not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #include <stdint.h> // uint32_t, UINT32_MAX #include <assert.h> // uint32_t, UINT32_MAX #include "cmsis.h" #include "nrf_soc.h" #include "nrf_sdm.h" #include "nrf_nvic.h" static uint8_t _sd_state = 0; static volatile uint32_t _entry_count = 0; void core_util_critical_section_enter() { // if a critical section has already been entered, just update the counter if (_entry_count) { ++_entry_count; return; } // in this path, a critical section has never been entered // routine of SD V11 work even if the softdevice is not active sd_nvic_critical_region_enter(&_sd_state); assert(_entry_count == 0); // entry count should always be equal to 0 at this point ++_entry_count; } void core_util_critical_section_exit() { assert(_entry_count > 0); --_entry_count; // If their is other segments which have entered the critical section, just leave if (_entry_count) { return; } // This is the last segment of the critical section, state should be restored as before entering // the critical section sd_nvic_critical_region_exit(_sd_state); }